Engine of self-propelled vehicles or boats.



G. J. MONTGOMERY.

ENGINE 0F SELF PROPELLED VEHICLES 0R BOATS.

, APPLICATION FILED JULY 11, 1911. 1,006,973, Patented 0013.24, 1911.

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G. J. MONTGOMERY.

ENGINE 0P SELF PROPELLED VEHICLES 0R BOATS.

APPLICATION FILED JULY 11, 1911v 1,006,973. Patented 001211911.

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0. J. MONTGOMERY.

ENGINE or SELF PROPELLED VEHIGLES 0R BOATS.

. APPLIDATION FILED JULY 11, 1911. 1,006,973. Patented 0011211911.

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CHRISTOPHER JOHN MONTGOMERY, OF ROCK FERRY, ENGLAND.

ENGINE 0F SELF-PROPELLED VEHICLES 0R BOATS.

Specification of Letters Patent.

Patented Oct. 2st, 1911.

Application filed July 11, 1911. Serial No. 637,993.

To all whom it may concern:

Be it known that I, CHRISTOPHER JoIIN MONTGOMERY, a subject of the Kingof England, residing at Rock Ferry, in the county of Chester, England,have invented certain new and useful Improvements in or Connected withEngines of SelfPropelled Ve hicles or Boats, of which the following is aspecification.

This invention has reference primarily to the engines or power machineryemployed for propelling vehicles on ordinary roads or streets, and tothat type of such engine having a variable stroke of piston, thevariations of which are effected through toothed or wormed gearing,arranged in connection with a vibrating arm, operated by itself, andcontrolled from outside the engine by hand or power driven mechanism.

The main object of the invention is the provision of simple andefiective means for controlling the variation in the piston stroke, andfor indicating the stroke condition, the indicating mechanismautomatically cutting out the operator-control at predetermined points.

In the following description of propelling machinery, the improvementshereunder are comprised.

.The engine may be assumed to be of multicylinder type, say with apluralityof parallel cylinders horizontally disposed; and the pistons ofthese cylinders work on power levers through connecting rods, the outerends of which are adjustable or varied by worm or screw gearing on saidlevers; and the power transmitted to said levers is transferred to thedriving crank shaftwhich may be below the cylinders-by other arms andconnecting rods. The ends of the connecting rods are connected to blockswhich work up and down on worms or screws connected with the vibratingpower levers referred to; and these screws are rotated by worm gearingcarried on a spindle or shaft on which the said levers or arms aresupported.

Motion is transmitted to the worm or screw gear referred to from theengines, so that the variable gear is worked from the engine; and powerfrom the engine is adapted to be applied to the said gear as and whendesired; so that the radius at which the pistons act upon the powerlevers or arms can be automatically efiected at any time in eitherdirection, making the stroke longer or shorter, while the engine is inmotion automatically. Between the engine driven shaft and the said gearshaft, there is an engaging and disengaging device, such as a clutch,which is adapted to be thrown in and out of action by a foot or handoperated mechanism from the seat of the driver, or other convenientpart.

An indicator is used in connection with the gear so as to show whatposition the connecting rods are acting on the power levers or arms; andthis indicator, in one form, may consist of a nut adapted to travel upand down on a worm, operated from the power arm or lever supportingshaft or gearing thereon; and this indicator device is also in somecases connected up with the clutch operating mechanism, so that when theindicator or nut or part has reached either end of its stroke, it willact through suitable connections upon said clutch gear, and throw it outof action when it is in action. Thus the attendant or driver cannotover-run the variable gear.

The invention will be further described in connection with theaccompanying drawings, which illustrate it.

In these drawings Figure l is a side ele= vation of the front part of avehicle showing the motor mechanism; Fig. 2 is an end view, partly insection; and Fig. 8 is a plan.

Referring to the drawings 1 are the main longitudinal members of thevehicle frame; 2 is the engine casing, which is carried from the framemembers 1; 3 are the engine cylinders; and 4 is the crank shaft.

5 are the rocking or vibrating arms or levers, which the pistons of themotors are connected to, and which they directly actuate; and 6 is theshaft on which they are loosely mounted; the shorter arms below theshaft 6 being connected with the cranks 7, by connecting rods 8. Thevibrating arms 5 carry the threaded rods 9, which pass through, and meshwith, blocks 10, to which the ends of the connecting rods 11 of themotor pistons are connected, and which bear and work on the face of thelevers 5, which receive the propulsive effort of the pistons, and thesethreaded rods 9 are revolved as and when required by worms 12 fixed onthe shaft 6, gearing with worm wheels 13 on the inner ends of the rods9, in the known way of engines of this type.

The shaft 6, and therefore the worms 12,

and worm wheel 13 and rods 9, are worked from the engine crank shaft 4in one or other direction, at will; and this is effected in the caseshown, by the use of two sets of gearing, one consisting of sprocketwhels 14, 15 on the shafts 4, and 6, respectively, and a sprocket chain16; and the other consist ing of two spur wheels 17, and 18, on theshafts 4, and 6, respectively. Both the wheels 1% and'17 are looselymounted on the shaft 1, and they are connected up, or disconnected fromthe shaft 1, by a clutch 19, on the shaft 41, and operating inconnection with one or other wheel, alternatively, or placed out of gearwith both, when moved to the mid posi tion; the clutch 19 itself beingoperated from the foot board or seat of the driver, by treadle levers20, 21, connected respectively with the arm or bell crank 22, by rods23, 24k, and by a rod 25, connecting the bell crank 22, with the clutchlever 26. Thus, by the means described, the shaft 6, can be revolved inthe one direction or the other by the engine itself, though the sprocketor spur gears 14, 15, 17, 18; and the blocks 10, so moved farther from,or nearer to the shaft 6, so allowing, at will, the radius at which thepistons act on the arms or levers 5, and thereby varying the stroke ofthe pistons, and the power given out by them, and the mechanicaladvantage obtained.

The position of the blocks 10, on the rods 9, is made known to thedriver by an indicator, which in the case shown consists of a bar or rod27 carried on a nut 28, on a threaded rod 29, which is revolved from theshaft 6, by a worm 30 on it and a worm wheel 31 on the lower end of therod 29; so that when this rod 29 is revolved in one or other direction,the nut 28 is moved up or down the rod 29, and the level of the rod 27,which moves with the nut, shows the position of the block 10. The rodwill work in connection with stationary points, or a scale such as aplate 32. Movement of the blocks 10 too far, in either direction, isprevented by providing in connection with apart geared up with the shaft6, a part which is moved by it when it has been revolved a certainextent in one or other direction, and is connected to the clutchactuating mechanism. These provisions in the arrangement shown,

consist of a rod 33 connected with the bell crank 22, and having two jawprojections 3 L on it, one near the outer end, and the other near theother end of the rod 29, whereby, when the blocks 10 reach points nearthe end of these rods 9, and correspondingly when the nut 28 reaches apoint near the limits of its travel, it-the nut-comes in contact withone or other of the jaws 3 1, it moves the rod 33, and through the rod25, and the clutch lever 26, throws the clutch out of action with eitherthe wheel 14 or 17, and so stops the rotation of the screws 9.

I claim 1. A variable stroke piston mechanism for engines, including anadjusting shaft, a lever loosely mounted thereon, a connection betweensaid lever and the engine crank shaft, an adjusting element carried bythe lever, an operative connection between said element and the pistonrod, means carried by the adjusting shaft for actuating said element,driving members mounted on the engine crank shaft, driving members fixedon the adjusting shaft and operatively connected to the respectivemembers on the crank shaft, clutch mechanism for operatively connectingeither of the crank shaft driving members to said shaft,operato-ractuated means for controlling the clutch mechanism, anindicator to note the position of the piston rod connection on theadjusting element, and means actuated by the indicator mechanism toautomatically operate the clutch mechanism at predetermined points.

2. An engine of the type described, means to adjust the piston stroke,operator-controlled means for actuating said adjusting means, anindicator for said adjusting means, and mechanism automaticallycontrolled by the indicator to relieve the adjusting means from thepower of the actuating means therefor at predetermined limits of theindicator.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHRISTOPHER JOHN MONTGOMERY.

Witnesses:

SOMERVILLE GooDALL, FRANK E. FLEETWOOD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington. D. G.

